Due Diligence Checklist for Buying a Condo in Thailand

The first and most consequential question: is the unit being sold as freehold (registered title in your name at the Land Office) or as leasehold (a long-term lease, usually 30 years plus renewals)? These are completely different animals and they have wildly different risk profiles.

Freehold — you are listed as the registered owner at the Provincial Land Office. Your name is on the Chanote (in condo context, the Unit Title Deed, commonly referred to as the house registration but technically a Nor Sor Sam Gor for the land plus an allocation for the unit). You can sell, lease, mortgage, or will the unit. You pay Thai transfer fees once and that's it. This is what you should be buying.

Leasehold — you do not own the unit. You hold a long-term lease, typically structured as 30 years + 30 + 30 — the Thai Civil Code caps registered leases at 30 years, and the 'plus 30 + 30' is a contractual option to renew that is not enforceable in Thai courts the way Americans assume it is. The current legal reality: if the lessor (or their heirs) decides not to renew at year 30, the lessee has no functional recourse. Americans buy leasehold condos thinking they have 90 years of ownership and legally have 30. Thailand Law Online's condo guide is explicit about this.

Under the Thailand Condominium Act, freehold is specifically legal for foreigners within the 49% foreign quota of each building. If a seller is offering you leasehold, one of three things is true: (a) the 49% quota is full and freehold isn't available, (b) the building is in a category that can't offer foreign freehold at all (mostly off-plan developments that structured themselves as leasehold from inception), or (c) the seller is trying to move leasehold inventory to a buyer who doesn't know the difference.

The rule for Americans: prefer freehold, always. Only consider leasehold if you are fully aware of the 30-year enforceability limit and the discount is large enough (40-50% off comparable freehold) to justify the risk. Benoit Properties' leasehold explainer is reasonably candid about the limitations.

Under Section 19 bis of the Thailand Condominium Act, no more than 49% of the total floor area of a condominium building can be foreign-owned. The other 51% must be held by Thai nationals (or Thai companies with majority Thai ownership). This quota is building-wide, not unit-by-unit, and it is calculated based on floor area, not unit count.

When you want to buy, your lawyer asks the juristic person (the building's legal management entity, analogous to a US HOA but with more formal powers) for a Foreign Quota Certificate stating that there is available quota for the unit in question. This certificate needs to be current — within 30 days of your purchase — and it specifically states how much foreign quota remains and whether the unit in question fits within it.

If the foreign quota is already full, you cannot take freehold title to the unit. Your options are:

• Wait for another foreign owner to sell to a Thai national (rare and slow)
• Take leasehold (see above re: risks)
• Walk away

This is why you must check before paying a deposit, not after. Newer buildings in Bangkok's central districts (Sukhumvit, Silom) and Phuket's premium developments sometimes reach 49% foreign quota within a few years of completion, and the buildings with the highest foreign demand are exactly the ones where the quota tends to fill first. LexBangkok's 2025 foreign condo ownership update has current quota status for major Bangkok developments.

The foreign quota certificate request costs THB 500-2,000 (~$14-55 USD) and takes 1-3 business days. Non-negotiable to get before signing anything.

Thailand has multiple categories of land title deed, but for condominiums in urban Bangkok, Phuket, Chiang Mai, Hua Hin, Koh Samui, and Pattaya, the underlying land is almost universally Chanote (Nor Sor 4 Jor) — the strongest, fully-surveyed, GPS-accurate category. This is what you want. Anything weaker than Chanote (Nor Sor Sam Gor, Nor Sor Sam, Sor Por Kor) for condominium land should raise eyebrows.

Your lawyer requests a title search at the Provincial Land Office (Samnak-ngan Thi-din) covering:

• Current registered unit ownership
• Any mortgages, liens, or encumbrances on the unit
• Any disputes, court orders, or inheritance proceedings affecting the unit
• The underlying land title category and any encumbrances on the land itself (important — if the underlying land plot has issues, the condo units are affected)

Cost: THB 200-500 per document, negotiated as part of your lawyer's fees (legal fees in Thailand typically run THB 40,000-120,000 / $1,100-3,400 USD for a standard condo purchase). Time: 1-5 business days.

Critically, this search must be repeated within 48 hours of closing — titles can change in the interim, and you want a fresh document showing your unit is clear on the day you wire money.

The other thing to watch: off-plan condos (pre-construction) cannot receive full title until the building is registered under the Condominium Act and each unit receives its title allocation. Off-plan buyers receive a sales contract but no title. If the developer fails to complete the building or cannot register it (Pattaya and Phuket have multiple documented cases over the last decade), buyers can become unsecured creditors in a developer bankruptcy. Stick to completed, registered buildings for your first Thai condo purchase unless you have a specific risk tolerance for pre-construction.

Every Thai condominium is legally required to have a juristic person — a registered management entity that runs the building, collects monthly fees, maintains common areas, and pays building-level taxes and insurance. Americans often skip the juristic person analysis and regret it when their building's elevators stop working six months after closing because the sinking fund is broke.

Ask the juristic person for:

• Annual financial statements for the past 3 years (if the building is that old). These show the sinking fund balance, monthly fee collection rate, and operating expenses.
• Monthly common area fee schedule and current collection rate. Thai condo fees typically run THB 30-80 per square meter per month (so for a 60-square-meter Bangkok condo, that's THB 1,800-4,800/month, or $50-135 USD). In well-managed buildings, the collection rate is 95%+. In struggling buildings, it drops below 80%, which means the sinking fund is perpetually underfunded.
• Outstanding common fees on the specific unit you're buying. Under Thai law, unpaid common fees attach to the unit and become the buyer's responsibility if you don't resolve them at closing. This is the single most common post-closing surprise American buyers face. Always request a debt-free certificate from the juristic person within 30 days of closing.
• Major upcoming assessments. Buildings sometimes levy special assessments for facade repairs, elevator replacement, or structural work. You want to know about anything planned before you buy. An informal conversation with two or three current residents in the building is worth its weight in gold for this.
• Pet and short-term rental rules. Relevant if you plan to Airbnb the unit — Thai law restricts short-term rentals (under 30 days) in most condominium buildings, though enforcement varies. The Lawyers for Expats Thailand condo guide is honest about this gap.

Buildings with weak juristic persons and low collection rates are the ones that slowly degrade — broken lobbies, leaking pipes, non-functional pools, assessment demands every year. You can find these very clearly in the financial statements if you know where to look.

This is the Thailand-specific rule that American buyers routinely blow and which, uniquely, is completely non-negotiable with the Land Office. To register foreign freehold title to a Thai condo, the funds must arrive in Thailand from abroad in a foreign currency — not in baht — and the receiving Thai bank must issue you a Foreign Exchange Transaction Form, commonly called the Tor Tor 3 (TT3), documenting the inbound currency conversion.

Specifically: you wire USD (or EUR, or any foreign currency) from your US bank to a Thai bank account. The Thai bank receives the USD, converts it to baht, and generates the Tor Tor 3 showing the conversion. The Land Office requires the original Tor Tor 3 at the moment of title transfer as proof that the purchase money originated from abroad in foreign currency.

If you wire baht directly to Thailand, the Land Office will refuse the transfer. If you use local Thai money (even legitimately earned), the Land Office will refuse the transfer. If you use a series of small transfers that each fall below the Tor Tor 3 threshold (currently USD 50,000 equivalent per individual transfer), the Land Office may refuse the transfer unless you can aggregate them with a single Tor Tor 3 equivalent.

The defense:

1. Wire in one or two large USD transfers directly from your US bank (or Wise, which does work for this purpose but needs confirmation from your specific Thai bank that they'll issue the Tor Tor 3 on receipt). Confirm the receiving bank's procedure before you wire — some Thai banks (Bangkok Bank, Kasikorn, Siam Commercial) are familiar with Tor Tor 3 issuance for foreign buyers; some smaller banks are not.
2. Request the original stamped Tor Tor 3 when the funds are converted. It is a physical document.
3. Bring the Tor Tor 3 to the Land Office transfer appointment.

This is one of those rules where there is no workaround. The Thailand Law Online condo buying page has the specific procedural details and Conrad Properties' buyer guide has a step-by-step walkthrough worth reading.

The actual title transfer happens at the Provincial Land Office. Both parties (or their representatives via properly notarized power of attorney) appear in person with a folder of original documents:

• Original Chanote / unit title deed
• Foreign Quota Certificate from juristic person (current, within 30 days)
• Debt-free certificate from juristic person (current, within 7 days)
• Tor Tor 3 / Foreign Exchange Transaction Form
• Buyer's passport
• Seller's ID / passport / corporate documents if seller is a company
• Sale contract
• Cashier's check or bank draft for the balance

At the Land Office, the transfer officer verifies all documents, calculates taxes and fees, collects payment, and issues a new title deed with the buyer's name. The whole process takes 2-4 hours if nothing is missing. If anything is missing or wrong — a typo in the Tor Tor 3, an outdated foreign quota certificate — the transfer is rescheduled and you come back another day.

Closing costs at the Land Office (customarily split in various ways between buyer and seller, though the default under Thai law is that they're negotiable):

• Transfer fee — 2% of appraised value. Usually split 50/50 or paid by buyer.
• Specific business tax — 3.3% of the greater of appraised value or sale price, paid by seller if the property was held less than 5 years. Otherwise replaced by stamp duty.
• Stamp duty — 0.5% of greater of appraised value or sale price, paid by seller if SBT doesn't apply.
• Withholding tax — graduated based on years held and seller's tax bracket; paid by seller.

For an American buyer, expect total out-of-pocket closing costs around 2-3% of purchase price assuming you cover the full transfer fee plus your own legal fees. This is substantially cheaper than buying in Europe. Budget 5% all-in for safety.

For Thai tax treatment of rental income and the cross-border reporting obligations for Americans, see our article on US taxes on foreign rental income and our FBAR and foreign real estate piece.

Thailand is not a high-scam market for competent buyers, but the specific tactics that target Americans cluster into a few categories:

'Nominee' Thai company structures. An agent offers to help you buy a 'house' (with land) through a Thai company where you are technically a 51% minority shareholder and a Thai friend (or the agent themselves) holds 51%. This is illegal under the Foreign Business Act and the government has been enforcing it selectively since 2017. Do not do this. If you want land in Thailand, you can't legally have it. Move on or accept the condo freehold structure.

Off-plan developer failures. Pre-construction projects where the developer sells units, collects deposits, and fails to deliver — either because they run out of money or because the building fails to register under the Condominium Act. Phuket has had multiple documented cases. Stick to completed registered buildings or accept the risk knowingly.

Inflated foreign pricing. Similar to the Mexican gringo pricing dynamic, Thai agents price units to foreigners higher than to Thai buyers. On Sukhumvit premium units the foreign markup is typically 10-20%. Negotiate. Pull comparable data from DD Property and Hipflat.

Fake foreign quota certificates. Rare but documented — a forged certificate from a non-functional juristic person. Verify by visiting the juristic person office in person, ideally with a Thai-speaking attorney.

Hidden encumbrances on the underlying land. The condo building sits on a specific land plot, and if that land plot has issues (disputes, unregistered easements, boundary problems), the condo units inherit those issues. Your lawyer's title search should include the underlying land, not just the unit.

For a comparison of condo freehold rules across Southeast Asia, see our article on can Americans own beachfront property in Thailand and our Vietnam vs. Thailand comparison. For live Thai condo listings calibrated to American buyers, browse our Bangkok page, Chiang Mai page, and Phuket page. And for the other country where Americans frequently look next, our Philippines guide is worth reading for contrast.